| HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| OVERALL LENGTH | 1.019 INCHES MINIMUM AND 1.029 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 8740 OR STEEL COMP 4340 OR STEEL COMP 4140 |
| NOMINAL THREAD SIZE | 0.375 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.375 INCHES STUD THREAD |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.405 INCHES MINIMUM AND 0.425 INCHES MAXIMUM NUT THREAD |
| THREAD LENGTH | 0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM STUD THREAD |
| THREAD PITCH DIAMETERS | +0.3392 TO 0.3407 INCHES STUD THREAD |
| THREAD QUANTITY PER INCH | 16 STUD THREAD |
| THREAD QUANTITY PER INCH | 24 NUT THREAD |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| THREAD SERIES DESIGNATOR | UNS STUD THREAD |